Improvement in governors for steam-engines



UNITED STATES PATENT OFFICE.

JAMES M. EEES, OE SCOTT, OHIO.

IMPROVEMENT IN GOVERNORS FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. 50,496, dated October 17, 1865.

To all 'whom it 'may concern Be it known that I, JAMES lVLREEs, of Scott, inthe county ofAdams and State of Ohio, have invented a new and Improved Governor for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable those skilled in the nrt to make and use the saine, reference being had to the accompanying drawing, forming part of this specification.

Ihe drawing represents a vertical central section of this invention, showing its application to a steam-boiler.

This invention relates to a governor of that class which tend to equalize the action of the steam upon the engine by means entirely7 independent of said machinery, or otl the speed Wit-h which said machinery runs, and the action of Which depends entirely upon the pressure of the steam in the boiler. It` the pressure in the boiler rises a valve in.the steam-pipe closes, and the quantity ot' steam admitted to theengine is reduced, and vice versa.

The governor consists of a piston Working in a cylinder or tube which is secured in the upper part of a steam-boiler. A spiral spring has a tendency to depress the piston, and the piston-rod connects with a lever, which is provided with a number ot' holes, from one of which a rod extends to a corresponding' hole in an armmounted on the end of the valve-spindle. If the pressure ofthe steam rises the piston is forced up against the action of the spring, and the valve partially closes, and vice versa. By changing the rod connecting the lever with the arm on the valve-spindle the position of said valve can be regulated.

A represents a tube, which is provided with `Aspiral spring, a, has a tendency to depress the piston against the action ot' the steam. The piston-rod connects by a link, I), with a lever, E, which has its fulcrum in a standard, c, rising from the tube A, and the loose end of said lever connects by a rod, d, with'an arm, e, that is mounted on the spindle of the throttle-valve j'. The rod el is adjustable in a series of' holes,

g h, in the lever E and arm e, so that the position Ot' the valvefcan be regulated at any moment. It' the pressure of the steam in the' boiler increases it forces the pistou up, and the throttle-valve closesl and vice versa, and the quantity of steam passing' to the engine is thus regulated according to the pressure ofthe steam in the boiler.

I do not claim as my invention the use ot' a pisto'n to operate the throttle-valve, such having been described in an application forapatent made by Z. Beeson, and rejected 10th July, 1854; but

I claim as new and desire to secure by Letters Patent- The adjustable rod d, in combination with 

